assets内のjsonファイルをJSONICでparseするサンプル (Android)

JSonicTest.java

public class JSonicTest extends JsonicTestCaseBase {

    public void testDecodeJson() {
        for (WebApiType apiType : WebApiType.values()) {
            String jsonText = createJsonText(apiType);

            // decode
            Object o = decodeJson(apiType, jsonText);
            if (o != null) {
            }
        }
    }
}

JSonicTestCaseBase.java

public abstract class JSonicTestCaseBase extends AndroidTestCase {

    protected Context getContext4Real() {
        return getTargetContext(getContext(), ContextType.REAL);
    }

    protected Context getContext4Test() {
        return getTargetContext(getContext(), ContextType.TEST);
    }

    public enum ContextType {
        /** Context(本体アクセス用) */
        REAL("daichan4649.jsonic"),

        /** Context(test/assets アクセス用) */
        TEST("daichan4649.jsonic.test");

        private String packageName;

        private ContextType(String packageName) {
            this.packageName = packageName;
        }

        public String getPackageName() {
            return packageName;
        }
    }

    public static Context getTargetContext(Context context, ContextType contextType) {
        int flags = Context.CONTEXT_IGNORE_SECURITY;
        try {
            return context.createPackageContext(contextType.getPackageName(), flags);
        } catch (NameNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    protected Object createTestResponse(WebApiType apiType) {
        // json
        String jsonText = createJsonText(apiType);

        // decode
        return decodeJson(apiType, jsonText);
    }

    protected String createJsonText(WebApiType apiType) {
        try {
            Context context = getContext4Test();
            return readJsonFile(context, apiType.getJsonFileName());
        } catch (Exception e) {
            return null;
        }
    }

    protected static Object decodeJson(WebApiType apiType, String jsonText) {
       try {
            return JSON.decode(jsonText, apiType.getDecodeTargetClass());
        } catch (Exception e) {
            return null;
        }
    }

    protected static String readJsonFile(Context context, String jsonFileName) {
        InputStream is = null;
        StringBuilder texts = new StringBuilder();
        try {
            AssetManager assets = context.getResources().getAssets();
            is = assets.open(jsonFileName);
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            String line = "";
            while ((line = reader.readLine()) != null) {
                texts.append(line);
            }
            reader.close();

            return texts.toString();

        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
        }
    }

    public enum WebApiType {
        NONE("", null),
        /** ログイン */
        LOGIN("login", LoginResponse.class),
        /** ログアウト */
        LOGOUT("logout", LogoutResponse.class),

        private static final String EXTENSION = ".txt";

        private String url;
        private Class<? extends GenericResponse> decodeTargetClazz;

        private WebApiType(String url, Class<? extends TestResponse> clazz) {
            this.url = url;
            this.decodeTargetClazz = clazz;
        }

        public String getJsonFileName() {
            return url + EXTENSION;
        }

        public Class<?> getDecodeTargetClass() {
            return decodeTargetClazz;
        }
    }
}